Expansible honing tool



April 15, 1947. .1. GAZOLAS EXPANSIBLE HONING TOOL Filed Oct. 30, 1944 us 132025 a 0 0 I fi TA R N Ell 0 VM q 2 WG A e K 0 m m7 8 M 6 G 2 I- 1 m n v n B 5 .2 2 G 9 I 9 n O I ,1 v 7 m z I 6 z 6 a I 2 FIGIQ.

Patented Apr. 15, 1947 EXPANSIBLE HONING TOOL Jack Gazolas, Chicago, Ill., assignor of one-half to Mario Marin, Chicago, Ill.

Application October 30, 1944, Serial No. 560,948

This invention relates to an expansible honing or lapping tool and more particularly to a power driven chuck engaging tool adapted for honing or lapping bearings, bores, and similar openings to effect the precision finishing thereof.

In contemplates more especially a simple, inexpensive, and highly efiicient honing tool that is effective for smoothing out and trueing up of bearings after reaming or finishing holes, or bores after drilling so that an accurate and close fitting bearing surface is produced, so that there will be minimum play, wear, and friction between the bearing bore or opening and its complement.

In the fitting of machine parts wherein one member is to rotate or oscillate relative to another at high speed, it is important that the interfitting contacting surfaces be smooth and in full and complete contact with each other. In the reaming of bearings, the bearing surfaces cannot be made smooth enough to insure complete and full contact of the bearing surfaces, and mere drilling of holes or bores for interfitted relative moving parts, is not sufliciently accurate nor conducive to good results.

One of the objects of my invention is to simplify the construction and improve the operation of devices of the character mentioned.

Another object is the provision of an expansible spring mounted honing blades for lapping bearings or bores of different sizes, particularly for use in smoothing bearing openings for wrist pins and the like which have been first reamed or for bores that have been drilled to receive interfitted parts.

Still another object is the provision of a simple lapping tool wherein spring mounted honing blades are spaced in a sleeve for support on a' stud to which an adjusting nut is threadedly engaged.

Other and additional objects will appear from the following description of an illustrative embodiment of the present invention.

In the drawing:

Figure 1 is a front elevation of a device embody ing features of the present invention.

Figure 2 is a longitudinal sectional view taken.

substantially alongline 11-11 of Figure 1 showing the body member and the elements carried thereby in section.

Figure '3 is a fragmentary sectional view in elevation of the honing blade spacer sleeve.

Figure 4 is a sectional view in elevation taken substantially along line IVIV of Figure 2.

4 Claims. (Cl. 51-1843) Figure 6 is an end plan view of the cupped washer shown in Figure 5.

Figure '7 is an end plan view of the adjusting nut that engages the threaded end of the stud.

Figure 8 is a fragmentary sectional view in elevation of the adjusting nut shown in Figure '7.

Figure 9 is a front view in elevation of a honing blade.

Figure 10 is an end view in elevation of the honing blade shown in Figure 9.

The structure selected for illustration is not intended to serve as a limitation upon the scope or teachings of the invention, but is merely 11111."- trative thereof. There may be considerable variations and adaptations of all or part of the teachings depending upon the dictates of commercial practice. The present embodiment comprises a body member or shank HI of cylindrical configuration adapted to be inserted in a chuck of a drill press or other machine member for effecting rotation thereof. The shank ID has a reduced coaxial cylindrical hub or extension- I I which merges with a further reduced shoulder I2 from which an axially extending rod l3 projects as an integral part of the shank ill. The axial rod i3 merges in a reduced stud M to define a shoulder l3 through a tapered shoulder l5 to provide a threaded reduced extremity I6 defining a shoulder I! serving as a stop for the correspondingly threaded fastener -and adjusting end nut l8 having a threaded axial bore i9 to engage the threaded stud end IS.

A tubular sleeve is detachably associated with the shank hub II and it extends fora distance beyond the stud shoulder l1 to terminate in a tapered end 2| complemental to the inward Figure 5 is a. fragmentary sectional view in ele vation of the blade supporting cupped washer.

concavity 22 of the fastener nut l8. A plurality of elongated abrasive blade receiving channels or slots 23, in this instance four, are provided in the sleeve 20 to extend from an intermediate point therein to communicate with the tapered end 2|, the slots 23 being uniformly and circumferentially spaced about the periphery of the sleeve 20 .to correspondingly retain abrasive blades 24.

The blades 2 in this instance four, are convergingly end tapered as at 25-26 toward their outer rounded honing edge 21, add their bottom edge 28 (Figure 9) is also tapered so they collectively converge toward the engaging end fastener lit. The end tapers 25-26 conform to the concavity 22 of the fastener 18 which together with an opposite end cup 29 having a. complemental concavity 30 (Figures 5 and 6) retain the honing abrasive blades 24 in position as will appear more fully hereinafter.

In effect, the blade members 24 have a taper in both a vertical (25-26) and horizontal (28) direction so that the latter abut against the axial stud shoulders l3 and I1 formed on the stud I3l4l6 and are confined against the sides of the sleeve slots 23. A spring 3| envelops the rod l3 to abut against the shoulder '2 to urge the cupped washer 29 against the honing blade ends 25 to normally maintain them against the adjusting fastener nut I8. Consequently, turning of the nut l8 inwardly along the threaded stud end 18 will displace the blades 24 over the stud shoulders |3ll to move the blades in-- wardly and outwardly in the sleeve slots 2'3 against the urge of the spring 3|. Opposite turning of the adjusting nut l8 will diminish the diametrical honing extent of the blades 24 which can either be shaped from mild abrasive stone or metal or constitute a composite blade made from both.

Thus the adjustment of the efiective honing diameter is provided by the operator turning the nut l8 on the threaded stud portion I6 which together with the sleeve 2!] drives the abrasive blade members 24 therewith to finish the surface against which the blade edges 21 effect contact. The sleeve 20 is preferably sweated onto the shank hub II to preclude relative rotary displacement therebetween.

It will be noted that a very simple and inexpensive honing tool has been provided wherein there are few parts and adjustment thereof to different diameters can be readily efiected.

While I have illustrated and described a preferred embodiment of this invention, it must be understood that the invention is capable of considerable variation and modification without departing from the spirit of the invention. 1, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

I'claim:

l. A honing tool comprising in combination, a body member having an axial cylindrical stepped stud presenting spaced peripheral shoulders and a spaced sleeve, said sleeve being provided with straight channels therein extending to an end thereof opposite the driven end of the body member, a plurality of honing members having inwardly inclined ends in said channels to rest on said spaced peripheral shoulders, said honing members having inclined bottom edges to con-' tact said cylindrical stepped and spaced shoulders on said stud, a movable member having a concave surface movable along said stud in engagement with the inclined inner ends of the honing members and in cooperative relation with the body member, an end member having a concavity to engage the outer ends of said honing members and the sleeve end of said body member, said last named member being in threaded engagementwithsaid stud to cooperate therewith in adjustably supporting said honing members, and means for urging said movable member against said honing member.

2. A honing tool comprising in combination, a

body member having an axial cylindrical stepped stud presenting spaced peripheral shoulders and a spaced sleeve, said sleeve being provided with straight channels therein extending to an end thereof opposite the driven end of the body memsaid spaced peripheral shoulders, said honing members having inclined bottom edges to contact said cylindrical stepped and spaced shoulders on said stud, a movable member having a concave surface movable along said stud in engagement with the inclined inner ends of the honing members and in cooperative relation with the body member, a spring enveloping said stud to urge said movable member in the direction of said honing members, and an end member having a concavity to engage the outer ends of said honing members and the sleeve end of said body member, said last named member being in threaded engagement with said stud to cooperate therewith in adjustably supporting said honing members.

3. A lapping tool comprising in combination, a body member having an integral axial cylindrical stepped stud presenting spaced peripheral shoulders and a detachably associated sleeve, said sleeve being provided with a plurality of channels communicating with an end opposite the driven end of the body member, said stud having spaced shoulders thereon, a plurality of honing members having inwardly inclined ends in said channels to rest on said spaced peripheral shoulders, said honing members having inclined bottom edges to contact said cylindrical stepped and spaced shoulders on said stud, a movable member on said stud and having a concave surface for engagement of the inner inclined ends of said honing members, a spring enveloping said stud to urge said movable member against said honing members, an adjustable fastener threaded to the free end of said stud and proof the body member, said stud having spaced shoulders thereon, a plurality of honing members havin inwardly inclined ends in said channels, said honing members having inclined bottom edges to contact the spaced shoulders on said stud for support thereon, a movable member on said stud and having a concave surface for engagement of the inner inclined ends of said honing members, a spring enveloping said stud to urge said movable member against said honing members, an adjustable fastener threaded to the free end of said stud and provided with a concave surface engaging the outer inclined ends of said honing members to cooperate with the shoulders on said stud in fixedly supporting said honing members.

JACK GAZOLAS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,170,585 Beard Aug. 22, 1939 2,283,132 Wommer May 12, 1942 

